topic Re: FM Tuner interface in i.MX Processors

FM Tuner interface

malays — Fri, 05 Jun 2020 19:51:05 GMT

I am looking for interface between si4731 -DEMO board with imx8m-mini development board. I think i have to add device driver for si4731 I2S integration part. I saw there is a kernel support for SI476x series codec from Silicon Lab, but couldn't find any reference for SI4731 tuner.

Please guide me for this integration. I want to read Tuner data through I2S interface on iMX8M mini board.

Re: FM Tuner interface

igorpadykov — Fri, 05 Jun 2020 23:46:32 GMT

Hi Malay

one can look at linux tuner drivers documentation

https://kernel.readthedocs.io/en/latest/media/v4l-drivers/tuners.html

and Porting Guide included in NXP Linux documentation

i.MX Software | NXP

Best regards
igor
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Re: FM Tuner interface

malays — Sat, 06 Jun 2020 06:00:46 GMT

Hi igor,

Thank you for your reply.

So, my understanding is correct right ?

I have to write a new driver for the SI4731 Tuner interface.

The link you have shared doesn't provide any detail for the specific tuner

SI4731 from Silicon Lab.

Re: FM Tuner interface

igorpadykov — Sun, 07 Jun 2020 08:17:23 GMT

Hi Malay

right, it is necessary to write SI4731 driver.

Best regards
igor

Re: FM Tuner interface

malays — Sat, 13 Jun 2020 07:59:03 GMT

Hello,

I am looking for some guidance/ reference for the compilation of device tree file.

I modify the device tree file (path - tmp/work-shared/imx8mm-var-dart/kernel-source/arch/arm64/boot/dts/freescale) and tried to update the the image. But i am not able to see the changes reflected in the final image.

Steps I followed -

update some values in device tree file.

bitbake -c devshell virtual/kernel

make dtbs

bitbake -c deploy -f virtual/kernel

But the changes are not consistent.

Is this the correct flow.? Please provide the good reference for the same.

Thank you in advance.!

Re: FM Tuner interface

igorpadykov — Sat, 13 Jun 2020 11:00:23 GMT

one can look at

https://boundarydevices.com/mx6-device-tree-customization/

Best regards
igor